Sunpipes are offered in 10 sizes from 230 to 1500 mm diameter.
Monodraught has also added the Sola-Vent to its range of energy-free systems. Sola-Vent is a solar-driven extract fan, in two sizes and designs. They incorporate a 230 or 300 mm-diameter SunPipe to provide daylighting and solar-powered ventilation. Two integral batteries provide 8 h of backup operation, which is charged by a 600 x 300 mm photo-voltaic panel on the roof.
Sola-Vents also incorporate two low-voltage halogen downlighters.
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